Dimensioning and Tolerancing: Master the Fundamentals of CAD Drawings

Question 1

Which of the following is NOT a type of linear dimension?

Accepted Answer

Radial

Answer

Aligned

Answer

Ordinate

Answer

Staggered

Question 2

What is the difference between a general tolerance and a local tolerance?

Accepted Answer

A general tolerance applies to all dimensions on a drawing, while a local tolerance applies to specific dimensions within a feature.

Answer

A local tolerance applies to all dimensions on a drawing, while a general tolerance applies to specific dimensions within a feature.

Answer

General tolerances are more precise than local tolerances.

Answer

Local tolerances are more precise than general tolerances.

Question 3

What is the purpose of using a datum in a drawing?

Accepted Answer

To establish a reference point for measurements and geometric tolerances.

Answer

To indicate the origin of the coordinate system.

Answer

To define the orientation of the part.

Answer

To provide additional information about the part.

Question 4

Which of the following is not a type of dimensioning tolerance?

Accepted Answer

Surface Roughness

Answer

Linear Tolerance

Answer

Angular Tolerance

Answer

Geometric Tolerance

Question 5

Why are dimensioning and tolerancing crucial in engineering drawings?

Accepted Answer

They guarantee precision and uniformity in manufacturing.

Answer

They enhance the visual appeal of drawings.

Answer

They shorten production time.

Question 6

What is the primary purpose of a tolerance in technical drawings?

Accepted Answer

To indicate the allowable variation in a dimension

Answer

To specify the exact dimensions of a feature

Answer

To provide a reference point for other dimensions

Answer

To indicate the material used

Question 7

Which symbol is commonly used to indicate a general tolerance in technical drawings?

Accepted Answer

±

Answer

*

Answer

√

Answer

%

Question 8

What is the key difference between a unilateral tolerance and a bilateral tolerance?

Accepted Answer

Unilateral tolerance applies to one side of a dimension, while bilateral tolerance applies to both sides

Answer

Bilateral tolerance applies to one side of a dimension, while unilateral tolerance applies to both sides

Answer

Unilateral tolerance is more precise than bilateral tolerance

Answer

There is no difference between unilateral and bilateral tolerance

Question 9

Which of the following is NOT a type of fit tolerance used in engineering drawings?

Accepted Answer

Geometric fit

Answer

Clearance fit

Answer

Interference fit

Answer

Transition fit

Question 10

What is the main purpose of a surface texture symbol in technical drawings?

Accepted Answer

To indicate the roughness or smoothness of a surface

Answer

To specify the dimensions of a surface

Answer

To indicate the material used

Answer

To provide a reference point for other dimensions

Question 11

What is the primary distinction between a drawing standard and a drawing convention?

Accepted Answer

Drawing standards are mandatory, while drawing conventions are optional

Answer

Drawing conventions are mandatory, while drawing standards are optional

Answer

There is no difference between drawing standards and drawing conventions

Answer

Drawing standards are more general than drawing conventions

Question 12

What is the primary purpose of a tolerance in engineering drawings?

Accepted Answer

To specify the allowable variation in a dimension.

Answer

To indicate the surface finish of a component.

Answer

To define the material of a component.

Answer

To provide assembly instructions.

Question 13

Which symbol is used to denote a diameter dimension?

Accepted Answer

⌀

Answer

Δ

Answer

□

Answer

○

Question 14

What is the main function of a datum in dimensioning?

Accepted Answer

To establish a reference plane or surface from which other dimensions are measured.

Answer

To indicate the overall size of the component.

Answer

To provide assembly instructions.

Answer

To specify the material of the component.

Question 15

Which of these is not considered a recommended practice when dimensioning engineering drawings?

Accepted Answer

Dimensioning from hidden lines.

Answer

Using consistent units and scales throughout the drawing.

Answer

Avoiding redundant dimensions.

Answer

Using clear and concise annotations.

Question 16

What is the intended purpose of a geometric dimensioning and tolerancing (GD&T) symbol?

Accepted Answer

To specify the form, orientation, or location of a feature.

Answer

To define the size of a feature.

Answer

To provide assembly instructions.

Answer

To specify the material of a feature.

Question 17

What is the primary purpose of dimensioning in a technical drawing?

Accepted Answer

To convey the exact size of a feature

Answer

To provide a reference point for locating other features

Answer

To indicate the surface finish of a feature

Answer

To show the shape of a feature

Question 18

Which of the following is NOT a type of dimension?

Accepted Answer

Supplementary dimension

Answer

Linear dimension

Answer

Angular dimension

Answer

Radius dimension

Question 19

What symbol is used to indicate a tolerance on a dimension?

Accepted Answer

±

Answer

%

Answer

*

Answer

/

Question 20

What is the purpose of a datum in a technical drawing?

Accepted Answer

To establish a reference point for dimensions and tolerances

Answer

To indicate the material of the part

Answer

To provide a location for assembly

Question 21

Which of the following is NOT a type of datum?

Accepted Answer

Floating datum

Answer

Tertiary datum

Answer

Secondary datum

Answer

Primary datum

Question 22

What is the difference between a general tolerance and a specific tolerance?

Accepted Answer

A general tolerance applies to all dimensions on a drawing, while a specific tolerance applies to a specific dimension or feature.

Answer

A general tolerance is more precise than a specific tolerance.

Question 23

What is the purpose of a surface finish symbol in a technical drawing?

Accepted Answer

To specify the desired surface roughness of a feature

Answer

To provide a location for assembly

Answer

To indicate the material of the part

Question 24

What is the difference between a primary and a secondary datum?

Accepted Answer

A primary datum is the main reference point for all other datums, while a secondary datum is used to establish a specific orientation or location.

Answer

A primary datum is more precise than a secondary datum.